Explain the relative advantages and disadvantages of an embedded OS based on an existing commercial OS compared to a purpose-built embedded OS.

IOP __________________________

Two types of phone operating system are being tested to determine if there is a difference in the proportions of system failures (crashes). Fifteen out of a random sample of 150 phones with $OS_1$ had system failures within the first eight hours of operation. Nine out of another random sample of 150 phones with $OS_2$ had system failures within the first eight hours of operation. $OS_2$ is believed to be more stable (have fewer crashes) than $OS_1.$ State the null and alternative hypotheses.

Compl$\'e$tez ces questions avec un, une ou des. Apr$\`e$s, posez les questions $\`a$ votre partenaire.

C’est biblioth$\`e$que ou restaurant? Ce sont _____ $\'e$tudiants ou _____ professeurs?

Dites s’il faut, s’il vaut mieux ou s’il ne faut pas faireces choses quand on voyage $\`{a}$ l’étranger.

oublier son passeport

Two types of phone operating system are being tested to determine if there is a difference in the proportions of system failures (crashes). Fifteen out of a random sample of 150 phones with $OS_1$ had system failures within the first eight hours of operation. Nine out of another random sample of 150 phones with $OS_2$ had system failures within the first eight hours of operation. $OS_2$ is believed to be more stable (have fewer crashes) than $OS_1.$ Is this a test of means or proportions?

What do you think are the advantages and disadvantages of relying on and applying online navigation in gathering specific information?

OD __________________________

What are some typical requirements or constraints on embedded systems?

The Z8000 also includes a block I/O transfer capability that, unlike DMA, is under the direct control of the processor. The block transfer instructions specify a port address register (Rp), a count register (Rc), and a destination register (Rd). Rd contains the main memory address at which the first byte read from the input port is to be stored. Rc is any of the 16-bit general purpose registers. How large a data block can be transferred?

Write electron configuration for the following ion.

$\mathrm{Os}^{2+}$ and $\mathrm{Os}^{3+}$

What is the theoretical speedup for a 4-stage pipeline with a 20ns clock cycle if it is processing 100 tasks?

What are the causes of bucket overflow in a hash file organization? What can be done to reduce the occurrence of bucket overflows?

What is an integer overflow? Can floating-point operations cause overflow?